Abstract: A box structure building partition constructed out of box designed to be installed in a building partition, articulated relative to box closing hatch, wherein the box structure features a closing hatch locking mechanism in the box and closing hatch features bracket in closing hatch socket for unlocking the locking mechanism, wherein bracket assumes two extreme positions in closing hatch, so that bracket in the first extreme position is retracted into closing hatch and the locking mechanism is locked and in the second extreme position bracket is slid out from closing hatch and the locking mechanism is unlocked and the bracket features a coupling for coupling element, accessible for a user when bracket is not in its first extreme position.

Abstract: A box construction lock with a strike plate assembly is provided. The box construction lock includes a locking mechanism with a locking latch-bolt, located in a lock housing, so that in the lock locked position, the locking latch-bolt is at least partially in the strike plate assembly, and there is adjustment range between the lock housing and the locking mechanism of the lock housing, so that the lock housing has at least two positions relative to the locking mechanism.

Abstract: Attic stairs include box, closing hatch for the box and ladder. The ladder is suspended in box using at least one flat bar attached to support beam seated in an upper section of the ladder. The support beam is a profile and each end of the profile has end cap with locking pin locking it in support beam.

Abstract: A bracket designed for mounting on flat panel hole is constructed out of base. Base includes plate. Plate includes at least one latching foot to seat the bracket in an assembly position in at least one hole in flat panel, and lower gap for edge of appropriate hole in flat panel is between plate and each latching foot.

Abstract: There is provided folding stairs having three segments of ladder stairs connected to one another with hinges. The first segment of stairs is connected with an articulated joint to a door frame using hinge holders fitted on the inside wall of the door frame, such that, during unfolding of these stairs rotation axle of the first segment of stairs does not change its position against the door frame. A flap is suspended to the first segment of stairs with at least two pairs of connecting rods, which together with the first segment of stairs and the flap form four-bar linkage.

Abstract: Folding stairs have three segments of ladder stairs connected by hinges. The first segment of stairs is connected by an articulated joint with door frame by means of hinge holders fitted from inside to door frame wall, and during unfolding of these stairs rotation axle of the first segment of stairs does not change its position against door frame. Flap is suspended to the first segment of stairs by means at least two couples of connecting rods, which together with the first segment of stairs and the flap form four-bar linkage.